Siemens Fusesaver operator panel 3AD8800-3AX1350-8D
it’s never been used but no genuine packaging
Description
The Remote Control Unit (RCU) is an optional addition to the Fusesaver™ system used to connect the Fusesaver™ to a utility's SCADA system. The RCU is a pole-mounted enclosure containing a microprocessor, a short-range (approximately 20 m) radio used to communicate with the Fusesaver™. The utility fits a long-range radio (or modem) to communicate with the SCADA centre.
RCU principle
Fusesavers™ are installed on each of the phases of the power line and are organised to work as a set to control that line. One, two, or three Fusesavers™ can be organised in this way for a single-phase, two-phase or three-phase line.
The RCU acts as an interface between a set of Fusesavers™ on the power line and a utility SCADA system. To do this, the RCU uses its configuration to find and access installed and running Fusesavers™. It communicates with the Fusesavers™ using its built in short-range radio.
In operation, the RCU acquires data from the Fusesavers™ and saves it in its database. Data is transmitted to the utility SCADA system master station over a long-range radio (or modem) using the DNP 3 protocol. The long-range radio (provided by utility) is mounted in the radio tray by the utility and is powered by the RCU. Data in the RCU database includes information about the Fusesavers™ and the RCU itself. Usually, a subset of this data is mapped into the protocol used by the SCADA system.
RCU system
To minimise installation and operating costs, the Siemens RCU was developed as part of an integrated system of tools and accessories. All system components work together, which permits easy installation, fast commissioning, and reliable operation in all conditions.
A typical Fusesaver™ and RCU installation includes the following items for each phase:
Fusesavers™ with communication modules installed permanently
RCU
Power supply for RCU.
Configuration of the RCU is achieved through a wireless connection to a PC application called RCU Connect.
Operator panel
The Fusesaver™ operator control panel is an optional accessory mounted on the radio tray and plugs into the RCU's electronics compartment. The operator control panel allows a local user to trip and close the Fusesavers™ or to change the active protection mode in the Fusesavers™.
It also provides additional status information.
There are two operator panels available, one panel for use when Fusesaver™ is configured in OC mode (with a partner fuse) and another for when Fusesaver™ is configured in the O-CO mode (without a partner fuse). As the O-CO mode has protection modes and features different from those for OC mode, the associated panel buttons are different. Even though Fusesaver™ is capable of being used in either OC or 0-CO mode, the correct panel must be selected for the mode that will be commissioned.
Low-temperature option
The low-temperature RCU includes a heater mounted behind the radio tray. It has a positive temperature coefficient element which acts as a thermostatic heater keeping the battery and electronic compartment above
-15°C for ambient temperatures as low as -30°C.
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Solar panel
In environments where good sunlight is available all year, it is possible to power the RCU using a solar power kit option.
This includes the solar panel, mounting bracket, and cable.
Solar powering of the RCU is also dependent upon power consumption of the utility's radio or modem being less than 100 mW on average.
The solar panel is connected into the terminal compartment to a dedicated set of terminals as an alternative to the mains supply.
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